diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3a73893d..6fa7439e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -76,8 +76,11 @@
   Wayland protocol ([#2212][2212]).
 * `[colors-dark]` section to `foot.ini`. Replaces `[colors]`.
 * `[colors-light]` section to `foot.ini`. Replaces `[colors2]`.
+* `XTGETTCAP`: added `query-os-name`, returning the OS foot is
+  compiled for (e.g. _'Linux'_) ([#2209][2209]).
 
 [2212]: https://codeberg.org/dnkl/foot/issues/2212
+[2209]: https://codeberg.org/dnkl/foot/issues/2209
 
 
 ### Changed
diff --git a/README.md b/README.md
index e8f3c8cd..7ee771ba 100644
--- a/README.md
+++ b/README.md
@@ -641,6 +641,10 @@ All replies are in `tigetstr()` format. That is, given the same
 capability name, foot's reply is identical to what `tigetstr()` would
 have returned.
 
+In addition to queries for terminfo entries, the `query-os-name` query
+will be answered with a response of the form `uname=$(uname -s)`,
+where `$(uname -s)` is the name of the OS foot was compiled for.
+
 
 # Credits
 
diff --git a/scripts/generate-builtin-terminfo.py b/scripts/generate-builtin-terminfo.py
index 28b31b57..6a6ba68c 100755
--- a/scripts/generate-builtin-terminfo.py
+++ b/scripts/generate-builtin-terminfo.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 
 import argparse
+import os
 import re
 import sys
 
@@ -185,6 +186,7 @@ def main():
     entry.add_capability(StringCapability('TN', target_entry_name))
     entry.add_capability(StringCapability('name', target_entry_name))
     entry.add_capability(IntCapability('RGB', 8))  # 8 bits per channel
+    entry.add_capability(StringCapability('query-os-name', os.uname().sysname))
 
     terminfo_parts = []
     for cap in sorted(entry.caps.values()):